Ceiling fan



FIG. 1 is a top perspective view of a ceiling fan, showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof; and,

FIG. 5 is a side view thereof.

Portions of the ceiling fan are shown in broken lines, and those portion shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a ceiling fan, as shown and described. 